Tube size question

[cycling_eejit]

My bike has 27.5" X 1.95" tyres. I've got a puncture, I've repaired it (I think!).
I previously bought a spare inner tube but it's 27.5" X 2.1"-2.5". Will it be OK to use this tube?

 

[Jody]

It'll be fine to use.

 

[cycling_eejit]

OK, I'm not usually this thick and am reasonably mechanically capable but I think I made almost every mistake possible fixing this puncture (and really lived up to my username)

First of all the replacement tube (despite it saying 27.5) looked to be a larger circumference than the one on the bike so I decided not to use it.

I removed the punctured tube, found a tack embedded in the tyre, removed it. Patched the tube (wasn't 100% happy with the patch but went ahead anyway). Reinflated tyre, no good, wasn't holding air.

Removed the tube again and replaced the patch I had done, patch looks good this time. Put it back in the wheel, reinflated - still not holding air!

Took off tube again, found 2nd puncture hole.
Examined the tyre and there was a second tack lodged in a different point, removed it and checked tyre for any more (pity I didn't do this the first time).
Patched the tube and then found 2 more punctures that had been caused by me putting the tube back in the tyre twice earlier!

So now my tube looks like a 2nd hand dartboard and has 4 patches on it. Good news is it's holding air now and I'm an expert at removing tyres and tubes!

Off now for a cycle

 

[Roseland triker]

700 X 25

 

[Cycleops]

Ah, the second and third puncture, always worth checking for.

 

[MichaelW2]

Always check for sharps , metal, glass, flint thorns. You often need a small blade to persuade them out. Beware of hyperdermic needles, never heard of one in a tyre but bear it in mind.

 

[cycling_eejit]

Always check for sharps , metal, glass, flint thorns. You often need a small blade to persuade them out. Beware of hyperdermic needles, never heard of one in a tyre but bear it in mind.

Thanks Michael, learned all that (and more) the hard way today!

 

[cycling_eejit]

Ah, the second and third puncture, always worth checking for.

Yeah, never even crossed my mind to check for a second puncture.
3rd and 4th were self inflicted because of that.

 

[the snail]

..Beware of hyperdermic needles, never heard of one in a tyre but bear it in mind.

Somebody on here posted a photo of one stuck in a tyre once, I don't run my fingers around the tyre to find the sharp thing anymore after seeing that.

 

[mjr]

Somebody on here posted a photo of one stuck in a tyre once, I don't run my fingers around the tyre to find the sharp thing anymore after seeing that.

Do you test for the sharp with tissue, cotton wool, flat screwdriver tip, or something else?

 

[mjr]

My bike has 27.5" X 1.95" tyres. I've got a puncture, I've repaired it (I think!).
I previously bought a spare inner tube but it's 27.5" X 2.1"-2.5". Will it be OK to use this tube?

Probably. Ignore inch (both UK and US) or French sizes in future: there are stupid things like 26"x2" is not 26"x2.0" and 700c x 35 is not 700x35c. Look for the ww-ddd numbers, 3 digit rim diameter and 2 digit tube width. The width may also be written lo/hi but as long as your desired width is between them, all is gravy.

 

[cycling_eejit]

Probably. Ignore inch (both UK and US) or French sizes in future: there are stupid things like 26"x2" is not 26"x2.0" and 700c x 35 is not 700x35c. Look for the ww-ddd numbers, 3 digit rim diameter and 2 digit tube width. The width may also be written lo/hi but as long as your desired width is between them, all is gravy.

Thanks for that!
Mine have 3 sets of numbers -
650 X 48B ( no idea what that means)
27.5" X 1.95" (which is what I was using)
48 X 584 (which I guess is what I should be using)

 

[MichaelW2]

Thanks for that!
Mine have 3 sets of numbers -
650 X 48B ( no idea what that means)
27.5" X 1.95" (which is what I was using)
48 X 584 (which I guess is what I should be using)

The 650 is a French designation. 650c is a skinny racing tyre for small people. 650B was a utility/touring tyre adopted by MTB marketing departments. The two are not compatible.